noun

behaviour that conforms to accepted standards of morality or respectability.

she had the decency to come and confess

propriety,decorum,seemliness,good taste,respectability,dignity,correctness,good form,etiquette,appropriateness,appropriacy,fitness,suitability,morality,virtue,modesty,purity,delicacy,demureness,wholesomeness,courtesy,politeness,good manners,civility,respect,respectfulness,consideration,thought,thoughtfulness,tact,diplomacy